:root {
      --primary: #1f7a8c;
      --primary-dark: #145265;
      --accent: #f3b34c;
      --bg: #f5f7fb;
      --text: #111827;
      --muted: #6b7280;
      --border: #e5e7eb;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
    }

    a {
      color: var(--primary);
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
    }

    /* HEADER */
    header {
      background: #ffffff;
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 20;
    }

    .header-inner {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0.75rem 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-weight: 700;
      letter-spacing: 0.04em;
      font-size: 1.1rem;
    }

    .logo-mark {
      width: 32px;
      height: 32px;
      border-radius: 999px;
      background: radial-gradient(circle at 30% 30%, #ffffff, var(--primary));
      border: 1px solid rgba(15, 23, 42, 0.1);
    }

    .header-right {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .tag-header {
      font-size: 0.75rem;
      background: #e0f2fe;
      color: #0369a1;
      padding: 0.25rem 0.7rem;
      border-radius: 999px;
      white-space: nowrap;
    }

    .btn-header {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.55rem 1.4rem;
      border-radius: 999px;
      border: none;
      background: var(--primary);
      color: #ffffff;
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      box-shadow: 0 8px 20px rgba(31, 122, 140, 0.25);
      transition: 0.18s ease;
    }

    .btn-header span {
      margin-left: 0.4rem;
    }

    .btn-header:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }

    /* MAIN LAYOUT */
    main {
      max-width: 1200px;
      margin: 0 auto;
      padding: 2rem 1.5rem 3rem;
    }

    /* === NEW PROFESSIONAL HERO === */
    .hero-pro {
      padding: 3.5rem 1.5rem 3rem;
      margin: 0 -1.5rem 2rem;
      background: linear-gradient(to bottom right, #f8fafc, #eef5f9);
      border-bottom: 1px solid #e5e7eb;
    }

    .hero-pro-inner {
      max-width: 1200px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 3rem;
      align-items: center;
    }

    .hero-pro-text h1 {
      font-size: 2.4rem;
      color: #0f172a;
      margin-bottom: 1rem;
      line-height: 1.2;
      font-weight: 700;
    }

    .hero-pro-text h1 span {
      font-size: 1.35rem;
      font-weight: 400;
      color: #334155;
      display: block;
      margin-top: 0.5rem;
    }

    .hero-pro-lead {
      font-size: 1.05rem;
      color: #475569;
      margin: 1rem 0 1.8rem;
      max-width: 36rem;
    }

    .hero-pro-benefits {
      list-style: none;
      padding: 0;
      margin: 0 0 2rem;
      color: #1e293b;
      font-size: 0.98rem;
      line-height: 1.7;
    }

    .hero-pro-benefits li {
      margin-bottom: 0.45rem;
    }

    .hero-pro-btn {
      display: inline-block;
      padding: 0.9rem 1.9rem;
      background: var(--primary);
      color: #ffffff;
      border-radius: 999px;
      font-size: 1rem;
      font-weight: 600;
      text-decoration: none;
      box-shadow: 0 10px 25px rgba(31, 122, 140, 0.25);
      transition: 0.2s ease;
    }

    .hero-pro-btn:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      text-decoration: none;
    }

    .hero-pro-image-wrapper {
      position: relative;
    }

    .hero-pro-image {
      width: 100%;
      height: auto;
      border-radius: 1.5rem;
      box-shadow: 0 25px 50px rgba(15, 23, 42, 0.15);
      border: 1px solid #e2e8f0;
      object-fit: cover;
      display: block;
    }

    .hero-pro-tag {
      position: absolute;
      bottom: -15px;
      right: 20px;
      background: var(--primary);
      color: #ffffff;
      padding: 0.5rem 1rem;
      border-radius: 0.75rem;
      font-size: 0.85rem;
      box-shadow: 0 10px 20px rgba(31, 122, 140, 0.35);
      white-space: nowrap;
    }

    /* ARTICLE */
    article {
      background: #ffffff;
      border-radius: 1.5rem;
      padding: 2rem 1.7rem;
      border: 1px solid var(--border);
      box-shadow: 0 12px 30px rgba(15, 23, 42, 0.04);
    }

    article h2 {
      font-size: 1.35rem;
      margin-top: 1.8rem;
      margin-bottom: 0.7rem;
    }

    article h3 {
      font-size: 1.05rem;
      margin-top: 1.3rem;
      margin-bottom: 0.5rem;
    }

    p {
      margin: 0.4rem 0 0.9rem;
      color: #111827;
      font-size: 0.98rem;
    }

    ul {
      padding-left: 1.3rem;
      margin: 0.4rem 0 1rem;
      color: #111827;
      font-size: 0.95rem;
    }

    li {
      margin-bottom: 0.35rem;
    }

    .highlight-block {
      border-radius: 1rem;
      border: 1px solid rgba(56, 189, 248, 0.4);
      background: linear-gradient(to right, #ecfeff, #eef2ff);
      padding: 1rem 1.1rem;
      margin: 1.3rem 0;
      font-size: 0.9rem;
      color: #0f172a;
    }

    .highlight-block strong {
      display: block;
      margin-bottom: 0.3rem;
    }

    .two-column {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 1.4rem;
      margin: 1.1rem 0 0.7rem;
    }

    .card {
      border-radius: 1rem;
      border: 1px solid var(--border);
      padding: 0.9rem 1rem;
      background: #f9fafb;
      font-size: 0.9rem;
    }

    .card h3 {
      margin-top: 0;
      margin-bottom: 0.4rem;
      font-size: 0.98rem;
    }

    .cta-section {
      margin-top: 2rem;
      padding-top: 1.2rem;
      border-top: 1px dashed var(--border);
      display: flex;
      flex-direction: column;
      gap: 0.7rem;
      align-items: flex-start;
    }

    .cta-note {
      font-size: 0.86rem;
      color: var(--muted);
    }

    .cta-small {
      font-size: 0.8rem;
      color: var(--muted);
    }

    .btn-article {
      display: inline-block;
      padding: 0.85rem 1.7rem;
      background: var(--primary);
      color: #ffffff;
      border-radius: 999px;
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      box-shadow: 0 10px 25px rgba(31, 122, 140, 0.25);
      transition: 0.2s ease;
    }

    .btn-article:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
      text-decoration: none;
    }

    /* FOOTER */
    footer {
      max-width: 1200px;
      margin: 0 auto;
      padding: 1.5rem 1.5rem 2.5rem;
      font-size: 0.8rem;
      color: var(--muted);
    }

    .footer-inner {
      border-top: 1px solid var(--border);
      padding-top: 1rem;
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      justify-content: space-between;
      align-items: center;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
    }

    /* RESPONSIVE */
    @media (max-width: 900px) {
      .header-inner {
        flex-direction: column;
        align-items: flex-start;
      }

      .hero-pro {
        padding: 2.5rem 1.5rem 2.5rem;
        margin: 0 -1.5rem 1.5rem;
      }

      .hero-pro-inner {
        grid-template-columns: 1fr;
        gap: 2.2rem;
      }

      .hero-pro-text h1 {
        font-size: 2rem;
      }

      .hero-pro-text h1 span {
        font-size: 1.1rem;
      }

      article {
        padding: 1.5rem 1.2rem;
      }

      .two-column {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      main {
        padding: 1.5rem 1.1rem 2.5rem;
      }

      .hero-pro {
        padding: 2.2rem 1.1rem 2.2rem;
        margin: 0 -1.1rem 1.5rem;
      }
    }